Use RestoreCustomHooks RPC in restore rake task

Gemfile

@@ -418,7 +418,7 @@ group :ed25519 do
 end
 
 # Gitaly GRPC client
-gem 'gitaly-proto', '~> 0.100.0', require: 'gitaly'
+gem 'gitaly-proto', '~> 0.101.0', require: 'gitaly'
 gem 'grpc', '~> 1.11.0'
 
 # Locked until https://github.com/google/protobuf/issues/4210 is closed

Gemfile.lock

@@ -283,7 +283,7 @@ GEM
       gettext_i18n_rails (>= 0.7.1)
       po_to_json (>= 1.0.0)
       rails (>= 3.2.0)
-    gitaly-proto (0.100.0)
+    gitaly-proto (0.101.0)
       google-protobuf (~> 3.1)
       grpc (~> 1.10)
     github-linguist (5.3.3)
@@ -1039,7 +1039,7 @@ DEPENDENCIES
   gettext (~> 3.2.2)
   gettext_i18n_rails (~> 1.8.0)
   gettext_i18n_rails_js (~> 1.3)
-  gitaly-proto (~> 0.100.0)
+  gitaly-proto (~> 0.101.0)
   github-linguist (~> 5.3.3)
   gitlab-flowdock-git-hook (~> 1.0.1)
   gitlab-gollum-lib (~> 4.2)

lib/backup/repository.rb

@@ -112,18 +112,31 @@ module Backup
       end
     end
 
+    def local_restore_custom_hooks(project, dir)
+      path_to_project_repo = Gitlab::GitalyClient::StorageSettings.allow_disk_access do
+        path_to_repo(project)
+      end
+      cmd = %W(tar -xf #{path_to_tars(project, dir)} -C #{path_to_project_repo} #{dir})
+      output, status = Gitlab::Popen.popen(cmd)
+      unless status.zero?
+        progress_warn(project, cmd.join(' '), output)
+      end
+    end
+
+    def gitaly_restore_custom_hooks(project, dir)
+      custom_hooks_path = path_to_tars(project, dir)
+      Gitlab::GitalyClient::RepositoryService.new(project.repository)
+        .restore_custom_hooks(custom_hooks_path)
+    end
+
     def restore_custom_hooks(project)
-      # TODO: Need to find a way to do this for gitaly
-      # Gitaly migration issue: https://gitlab.com/gitlab-org/gitaly/issues/1195
       in_path(path_to_tars(project)) do |dir|
-        path_to_project_repo = Gitlab::GitalyClient::StorageSettings.allow_disk_access do
-          path_to_repo(project)
-        end
-        cmd = %W(tar -xf #{path_to_tars(project, dir)} -C #{path_to_project_repo} #{dir})
-
-        output, status = Gitlab::Popen.popen(cmd)
-        unless status.zero?
-          progress_warn(project, cmd.join(' '), output)
+        gitaly_migrate(:restore_custom_hooks) do |is_enabled|
+          if is_enabled
+            local_restore_custom_hooks(project, dir)
+          else
+            gitaly_restore_custom_hooks(project, dir)
+          end
         end
       end
     end

lib/gitlab/gitaly_client/repository_service.rb

@@ -235,6 +235,28 @@ module Gitlab
         )
       end
 
+      def restore_custom_hooks(custom_hooks_path)
+        request = Gitaly::RestoreCustomHooksRequest.new(repository: @gitaly_repo)
+        enum = Enumerator.new do |y|
+          File.open(custom_hooks_path, 'rb') do |f|
+            while data = f.read(MAX_MSG_SIZE)
+              request.data = data
+
+              y.yield request
+              request = Gitaly::RestoreCustomHooksRequest.new
+            end
+          end
+        end
+
+        GitalyClient.call(
+          @storage,
+          :repository_service,
+          :restore_custom_hooks,
+          enum,
+          timeout: GitalyClient.default_timeout
+        )
+      end
+
       def create_from_snapshot(http_url, http_auth)
         request = Gitaly::CreateRepositoryFromSnapshotRequest.new(
           repository: @gitaly_repo,